Solve the systems in Problems (8-12) by the indicated method. By substitution: (left{begin{array}{l}y=1-2 x 5 x+2
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Solve the systems in Problems \(8-12\) by the indicated method.
By substitution: \(\left\{\begin{array}{l}y=1-2 x \\ 5 x+2 y=1\end{array}ight.\)
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